1161305444 has 12 divisors (see below), whose sum is σ = 2188614204. Its totient is φ = 535987104.

The previous prime is 1161305423. The next prime is 1161305447. The reversal of 1161305444 is 4445031611.

It can be written as a sum of positive squares in 2 ways, for example, as 488940544 + 672364900 = 22112^2 + 25930^2 .

It is not an unprimeable number, because it can be changed into a prime (1161305447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11166347 + ... + 11166450.

It is an arithmetic number, because the mean of its divisors is an integer number (182384517).

Almost surely, 2^1161305444 is an apocalyptic number.

It is an amenable number.

1161305444 is a deficient number, since it is larger than the sum of its proper divisors (1027308760).

1161305444 is a wasteful number, since it uses less digits than its factorization.

1161305444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22332814 (or 22332812 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 1161305444 is about 34077.9319208194. The cubic root of 1161305444 is about 1051.1115798807. Note that the first 3 decimals are identical.

The spelling of 1161305444 in words is "one billion, one hundred sixty-one million, three hundred five thousand, four hundred forty-four".